A 14-year-old boy has died after being found injured and unconscious on the hard shoulder of a motorway.
The boy, who has not been identified, was discovered on the M67 eastbound at junction 3, Hyde, Tameside, Greater Manchester around 5;25pm on 1 December.
He was taken to hospital in a critical but has since died from his injuries. Police believe he may have been involved in a rush-hour collison and suffered "unsurvivable" injuries.
It has been established that a grey convertible BMW was driving eastbound when it was involved in a collision with the teenager who was in the carriageway.
Police are now appealing for anyone who was driving on the motorway that evening who may have seen a predestrian on the road to get in touch.
Sergeant Lee Westhead, of GMP's Serious Collision Unit, said: "My thoughts are with the victim's family who are being looked after by specially trained officers at this difficult time.
"Whilst we work to uncover how this has happened and piece together the moments before the collision, I am asking the public to help in any way that they can.
"If you were in the area at approximately 5.25pm on December 1 and saw a pedestrian on the motorway, or have dashcam images, please get in touch and share this information."
Anyone with information is asked to contact police on 0161 856 4741 or 101, quoting incident number 1482 01/12/17. This can also be done anonymously through the independent charity Crimestoppers on 0800 555 111.